Cody Campbell — who was not breathing and did not have a heartbeat at one point — is making significant improvements and had gotten to the point where he was breathing on his own on Friday, Sgt. Frank Hatch of the Kennebec County Sheriff’s Office said.

“He’s a pretty resilient kid,” the sergeant said Friday.

The boy was found facedown and unresponsive in his family’s Northern Avenue pool by his mother, Karla Campbell, who was home with Cody, her two other children and two of their friends when the incident happened, according to a Kennebec County press release.

Karla Campbell dove into the pool and tried unsuccessfully to revive her son, the release said. He had no heartbeat and was not breathing when paramedics arrived, Hatch said.

Ambulance crews worked on the toddler and at about 7:45 a.m. Thursday took him to MaineGeneral Hospital in Augusta, and then he was flown by LifeFlight to Maine Medical Center, where staff put him on a ventilator, Hatch said.